/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/CollisionConvexMesh.h
Convert multi-triangle faces to single n-gons.
static void MergeFaces ( [TArray](API\Runtime\Core\Containers\TArray)< [FPlaneType](API\Runtime\Chaos\Chaos\TPlaneConcrete) > & InOutPlanes, [TArray](API\Runtime\Core\Containers\TArray)< [TArray](API\Runtime\Core\Containers\TArray)< int32 >> & InOutFaceVertexIndices, const [TArray](API\Runtime\Core\Containers\TArray)< [FVec3Type](API\Runtime\ChaosCore\Chaos\TVector_T_3) > & Vertices, FRealType DistanceThreshold )